Self-imaging, self-healing beams generated by photorefractive volume holography
Self-imaging beams consisting of three-dimensional intensity voids are generated via photorefractive volume holography. Reconstruction of a volume hologram recorded at 594 nm is performed with a Bessel readout beam. The holographic output is similar in appearance to a Bessel beam, with the central s...
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| 格式: | text |
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Archīum Ateneo
2015
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| 主題: | |
| 在線閱讀: | https://archium.ateneo.edu/physics-faculty-pubs/1 https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-54/issue-10/104113/Self-imaging-self-healing-beams-generated-by-photorefractive-volume-holography/10.1117/1.OE.54.10.104113.short?SSO=1 |
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| 總結: | Self-imaging beams consisting of three-dimensional intensity voids are generated via photorefractive volume holography. Reconstruction of a volume hologram recorded at 594 nm is performed with a Bessel readout beam. The holographic output is similar in appearance to a Bessel beam, with the central spot oscillating between maximum and zero intensity over a propagation distance of 10 to 55 cm. The oscillation period for the on-axis intensity is 30 cm. The reconstruction is capable of self-healing, with a fully recovered central core after the beam propagates 40 cm. Dual-wavelength reconstruction at 632.8 nm produces an output beam with similar self-imaging and self-healing properties. A theoretical framework based on the interference of a plane wave and a Bessel beam simultaneously reconstructed from a volume hologram is able to describe our experimental results. |
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